Q. 105.0( 2 Votes )

Which of the following is equal to 1?
A. 20 + 30 + 40

B. 20 × 30 × 40

C. (30 – 20) × 40

D. (30 – 20) × (30 + 20)

Answer :

We have the law of Indices as follows:

a0 = 1


Where a = any integer


Let us try option A.


20 + 30 + 40 = 1 + 1 + 1


= 3


20 × 30 × 40 = 1 × 1 × 1


= 1


(30 – 20) × 40 = (1-1) × 1


= 0 × 1


= 0


(30 – 20) × (30 + 20) = (1-1) × (1 + 1)


= 0 × 1


= 0


So the correct answer is B.

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